基于优化HRNetV2的高分辨率遥感影像土地利用自动分类

研究目的：基于语义分割模型HRNetV2实现高分辨率遥感影像的土地利用自动分类,以期推动深度学习语义分割方法实现遥感影像的土地利用自动分类研究,并为该类研究提供可参考的案例。研究方法：首先对语义分割模型HRNetV2从损失函数、特征提取方面进行优化,以提高模型的分割精度;其次用优化后的HRNetV2模型对民乐县2 m的高分辨率遥感影像进行土地利用分类,并基于混淆矩阵对分类的结果进行评估。研究结果：（1）优化后的HRNetV2语义分割模型的MIOU达81.9%,相较于优化前提高了4.4%, 证明了优化方法的有效性;（2）针对民乐县进行的土地利用自动分类总体精度达89.72%,Kappa系数达0.888。研究结论：优化后的HRNetV2语义分割模型在高分辨率遥感影像的土地利用自动分类中具有较强的应用前景。     

Too Good to be True? An Analysis of the Options Market's Reactions to Earnings Releases

Using option implied risk neutral return distributions before and after earnings announcements, we study the option market's reaction to extreme events over earnings announcements. While earnings announcements generally reduce short‐term uncertainty about the stock price, very good news does not reduce uncertainty and slightly bad news actually increases uncertainty. We also find that left tail probabilities decrease over earnings releases while right tail probabilities increase. We interpret these findings as evidence of maintained investor expectations that very good news is generally not released during earnings announcements, combined with skepticism in the form of lingering uncertainty at the release of such very good news.     

Service Recovery Efforts in Fast Food Restaurants to Enhance Repeat Patronage

Abstract

The purpose of this study is to: (a) identify service failure incidents; (b) identify service recovery efforts; and (c) determine the effects of resolution levels repeat patronage. Employee service behavior and monetary rewards were found to have a significant effect on resolution levels. The manager should provide guiding principles to improve service quality. Furthermore, mentoring and empowerment may improve employee service performance. Complete resolution leads to repeat patronage. The study found significant relationships between demographic characteristics with service failures and service recovery efforts. Lastly, there were significant relationships between the critical service failures and service recovery efforts and types of fast food restaurants.     

Does delaying service-failure resolution ever make sense?

Conventional wisdom suggests that service providers should respond to their failures as quickly as possible. Some research, however, points out that delaying resolutions may produce highly desirable results. The study here investigates these competing views by examining under which conditions an immediate or a delaying resolution produces more positive consumer responses in term of re-patronage and negative word-of-mouth intentions. Based on the concept of service separation, this research identifies an interaction effect between service separation (separated service, non-separated service) and response timing (immediate response, delaying response) on consumers' post-consumption intention. This research also finds that the relationship between service separation-response timing interaction and consumer response is mediated by consumers' negative emotions. This study contributes to refining our understanding of consumer psychology in service recovery. Practically, the studies also enable service providers to better allocate their resources to recover different types of services' failure.     

一种提高薄互层储集层分辨率的新方法

目前，薄储集层横向追综、对比的困难，在于薄互层结构的高频信息经地层吸收，采集和接收后变得很弱，甚至被强干扰掩没，从记录上很难对薄互层储集层作追踪对比。本文提出了一种在复数域提高地震记录分辨率的处理方法，实际资料处理表明；它既提高了地震记录的分辨率又不降低其信噪比，是一种既经济又理想的处理方法。     

Strawberry fields forever? Conflict over neo-productivist Spanish polytunnel technology in British agriculture

This paper uses the example of Spanish polytunnels to demonstrate how the deployment of ‘neo-productivist’ agricultural technologies to meet the demands of food security and sustainability within a globalised food chain is likely to precipitate greater countryside conflict. Field-scale ‘Spanish polytunnels’ for strawberry growing have become a new feature of the British agricultural landscape. This has been driven primarily by supermarkets searching for high quality and quantity supplies of soft fruit. With production becoming industrialised, conflict has ensued in some rural communities where polytunnels have appeared. Interviews with prominent strawberry growers and protestors against polytunnels illuminate a vociferous and embittered wrangle. Within it, land use planners are labelled as ‘strawberry fools’ by both sides for failing, until recently, to provide decisive regulation to prevent conflict and effect its resolution. The paper concludes by drawing attention to the future characteristics of conflicts precipitated as new agricultural technologies are implemented rapidly, impact unevenly and are received acrimoniously.     

城市遥感在数字城市中的应用

随着城市化和信息化的稳步推进,数字城市建设被各地纳上议程。城市遥感在海量数据获取和处理方面具有强大优势,因而成为数字城市建设的核心技术之一。本文就城市遥感在数字城市建设中的具体应用进行了详细阐述。     

权利冲突：逻辑与现实

权利冲突问题是近年来法理学和民法学研究的一个热点问题,也是包括宪法学在内的许多法学学科领域的一个重要课题。笔者认为,在权利冲突问题的研究中,无论是权利冲突的界定,还是权利冲突的形式,无论是权利冲突的原因,还是权利冲突的化解,都既不能没有逻辑视野的开拓,更不能没有现实世界的观照。     

论区域金融风险的防范与化解

区域金融风险作为一种客观经济现象,其产生既有金融业自身的原因,也有金融业之外的原因。应该从建立区域金融风险预警系统、建立和完善金融机构内部风险控制体系、改进区域内金融监管机构对区域金融风险的监控水平、强化区域内金融机构的行业自律、改善防范与化解区域金融风险的外部环境等方面入手,对区域金融风险进行有效的防范与化解。     

一种一维距离像的识别算法

随着高分辨率雷达的发展,一维距离像识别已成为雷达目标识别的重要方法之一.为了消除一维距离像的平移,将一维距离像变换到频域,提取其频谱信息作为识别特征,并依据Fisher判据,将高维特征空间数据降到一维空间,提高了算法的实时性.仿真结果表明这是一种方便有效的识别方法.